From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C331DC76188 for ; Fri, 19 Jul 2019 04:04:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 93021218BB for ; Fri, 19 Jul 2019 04:04:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563509069; bh=MmcrwRpUgGYKVtIgUaPjrLet5cghNhkgQ0QjijFbGNA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=d9C0DjZ+qSW8R+vZaUW0Lt/m7viaiadepq/fTzvJV8BtaKL4yIE2cYvH1ffpZ0nL8 Tl8NlLXt8s/1mWW8NtvONiVTK5aWBls4Dwmu0JrJYBWzd4tpretXgc7c94TWXJk0G8 9VjL1OU6mhHDL9txhw1HjNyHhvYyhN6d4m3sxbP0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731059AbfGSEE2 (ORCPT ); Fri, 19 Jul 2019 00:04:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:36640 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727437AbfGSEEX (ORCPT ); Fri, 19 Jul 2019 00:04:23 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6685421873; Fri, 19 Jul 2019 04:04:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563509063; bh=MmcrwRpUgGYKVtIgUaPjrLet5cghNhkgQ0QjijFbGNA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WxaGwTinTYwSbQrKC6rEoVVY7kgL163lINNFp9Q70WgsF+qxKOJLbPA0T+PrBXtOc 3fVF+R8s929ZwlVWjaJ6dJ4S88mvhme3ha+TWjvUhx12SExX8m56yy4RXOahchHR/c Xuh56h/qFhC2rebH+WGfWVQSq7Hh7ywc7iBNH1mI= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Young Xiao <92siuyang@gmail.com>, Alexandru Ardelean , Jonathan Cameron , Sasha Levin , linux-iio@vger.kernel.org Subject: [PATCH AUTOSEL 5.1 047/141] iio:core: Fix bug in length of event info_mask and catch unhandled bits set in masks. Date: Fri, 19 Jul 2019 00:01:12 -0400 Message-Id: <20190719040246.15945-47-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190719040246.15945-1-sashal@kernel.org> References: <20190719040246.15945-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Young Xiao <92siuyang@gmail.com> [ Upstream commit 936d3e536dcf88ce80d27bdb637009b13dba6d8c ] The incorrect limit for the for_each_set_bit loop was noticed whilst fixing this other case. Note that as we only have 3 possible entries a the moment and the value was set to 4, the bug would not have any effect currently. It will bite fairly soon though, so best fix it now. See commit ef4b4856593f ("iio:core: Fix bug in length of event info_mask and catch unhandled bits set in masks.") for details. Signed-off-by: Young Xiao <92siuyang@gmail.com> Reviewed-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/industrialio-core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 9c4d92115504..00b6afde0f25 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -1117,6 +1117,8 @@ static int iio_device_add_info_mask_type_avail(struct iio_dev *indio_dev, char *avail_postfix; for_each_set_bit(i, infomask, sizeof(*infomask) * 8) { + if (i >= ARRAY_SIZE(iio_chan_info_postfix)) + return -EINVAL; avail_postfix = kasprintf(GFP_KERNEL, "%s_available", iio_chan_info_postfix[i]); -- 2.20.1